# encode = utf-8
# python3
# pycryptodemo 3.[羊城杯 2020]RRRRRRRSA.12.0

from functools import reduce
from hashlib import md5

import Crypto.PublicKey as pk

a = sum([len(str(i)) for i in pk.__dict__])
funcs = list(pk.__dict__.keys())
b = reduce(lambda a,b:a+b,[str(i) for i in funcs])
f = md5(b.encode()).hexdigest()
print('NSSCTF{' + f + '}')